[Linux-cluster] Two clusters in the network with same "name" in cluster.conf

[Parvez Shaikh]

Hi Laszlo,

Thanks for detailed information however I tried below but without success.

Thanks,
Parvez

On Wed, Mar 28, 2012 at 1:16 PM, Budai Laszlo <laszlo.budai at gmail.com>wrote:

> Hi,
>
> if you RAELLY need two clusters with the same name on the same subnet,
> then try to adjust the following parameters and use unique values for
> each cluster:
>
> /Multicast network configuration/
>    cman uses multicast UDP packets to communicate with other nodes in
>    the cluster. By default it will generate a multicast address using
>    239.192.x.x where x.x is the 16bit cluster ID number split into
>    bytes. This, in turn is generated from a hash of the cluster name
>    though it can be specified explicitly. The purpose of this is to
>    allow multiple clusters to share the same subnet - they will each
>    use a different multicast address. You might also/instead want to
>    isolate clusters using the port number as shown above.
>
>    It is possible to override the multicast address by specifying it in
>    cluster.conf as shown:
>
>    <cman> <multicast addr="229.192.0.1"/> </cman>
>
> /Cluster ID/
>    The cluster ID number is used to isolate clusters in the same
>    subnet. Usually it is generated from a hash of the cluster name, but
>    it can be overridden here if you feel the need. Sometimes cluster
>    names can hash to the same ID.
>
>    <cman cluster_id="669"> </cman>
>
> Kind regards,
> Laszlo
>
> On 03/28/2012 09:14 AM, Parvez Shaikh wrote:
> > Hi experts,
> >
> > I am running in to a problem in a situation where two clusters in the
> > network have same name.
> >
> > Node A, Node B : cluster name CLUSTER
> > Node C, Node D : cluster name CLUSTER
> >
> > Node C and Node D's cluster is running fine however when I start node
> > A it copies /etc/cluster.conf (I believe ccsd) from either C and D and
> > replaces its own and start attempting a cluster, of course it fails
> > because C or D is not a host name of node A.
> >
> > Is it possible to have more than one clusters in same network, these
> > nodes are in IBM blades hosted in Bladecenter and the heart beat IPs
> > are on private network.
> >
> > Thanks
> >
> >
> >
> >
> >
> > --
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>
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